``Line art'' gif of a schematic diagram of the ``All American''
five-tube
``AC/DC'' AM radio receiver. [``AC/DC'' here does not refer to
the heavy
metal band Butthead likes, but rather it means ``hot chassis.'']
Virtually all AM radio manufacturers used this exact circuit from about
1948 to 1963 or so. People are starting to collect these radios as
antiques of sorts.
[I would be happy to credit the creator of this figure and caption, but
I don't recall from where I down-loaded this. If you made it or know
who did, please give me an
electronic holler.]